Remote mapping in 1004

Hi there!
Two things. First - my remote which was perfectly working with 710 now does not do half of the commands. When media is playing I hit "Stop" - nothing happen. Yet in the USB_UIRT log I don't see anything. When I hit "Power" playback stops. Also "chanup" and "chandown" in media browser list does not do anything - it used to scroll one page up or down. I verified they are in the database.
Second. I got new Dell MCE remotes and IR receivers. When I install mce_usb2 device it complains:

========== NEW LOG SECTION ==========
1 11/21/11 22:21:10 60 (spawning-device) Starting... 47
1 11/21/11 22:21:10 60 (spawning-device) Found /usr/pluto/bin/LIRC_DCE
01 11/21/11 22:21:10.736 No SerialPort selected and no default entry found. Exiting. <0xb70846d0>
01 11/21/11 22:21:10.736 Connect() Failed <0xb70846d0>

Where should I look to fix that?

Thanks a lot for all your guidance)))